WO2019056303A1 - 电源提供电路、电源提供设备以及控制方法 - Google Patents

电源提供电路、电源提供设备以及控制方法 Download PDF

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Publication number
WO2019056303A1
WO2019056303A1 PCT/CN2017/102932 CN2017102932W WO2019056303A1 WO 2019056303 A1 WO2019056303 A1 WO 2019056303A1 CN 2017102932 W CN2017102932 W CN 2017102932W WO 2019056303 A1 WO2019056303 A1 WO 2019056303A1
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WO
WIPO (PCT)
Prior art keywords
power supply
supply circuit
current
charging
voltage
Prior art date
Application number
PCT/CN2017/102932
Other languages
English (en)
French (fr)
Chinese (zh)
Inventor
田晨
张加亮
Original Assignee
Oppo广东移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to KR1020197018300A priority Critical patent/KR102282301B1/ko
Priority to JP2019536307A priority patent/JP6781843B2/ja
Priority to CN201780061431.0A priority patent/CN109874364B/zh
Priority to PCT/CN2017/102932 priority patent/WO2019056303A1/zh
Priority to EP17925612.8A priority patent/EP3537567B1/de
Priority to TW107131353A priority patent/TWI700577B/zh
Publication of WO2019056303A1 publication Critical patent/WO2019056303A1/zh
Priority to US16/415,479 priority patent/US11050289B2/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00711—Regulation of charging or discharging current or voltage with introduction of pulses during the charging process
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/10—Control circuit supply, e.g. means for supplying power to the control circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H02J7/00034—Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0009—Devices or circuits for detecting current in a converter

Definitions

  • the present application relates to the field of charging, and more particularly, to a power supply circuit, a power supply device, and a control method.
  • the power supply circuit typically includes a primary conversion unit and a secondary conversion unit.
  • the primary conversion unit generally includes a primary rectification unit and a primary filter unit.
  • the primary filtering unit typically requires primary filtering of the primary rectified voltage using one or more large-capacity liquid electrolytic capacitors (such as liquid aluminum electrolytic capacitors).
  • the liquid electrolytic capacitor has short defects such as short life and explosive slurry, which leads to the short life and unsafe of the conventional power supply circuit.
  • the application provides a power supply circuit, a power supply device, and a control method, which can improve the service life and safety of the power supply circuit.
  • a power supply circuit comprising: a primary rectifying unit configured to rectify an input alternating current to output a first voltage whose voltage value periodically changes; and a modulating unit configured to modulate the first voltage And generating a second voltage; a transformer for generating a third voltage according to the second voltage; a secondary rectification filtering unit, configured to rectify and filter the third voltage to generate a first current; and a control unit, configured to: Adjusting the first current to generate an output current of the power supply circuit, the output current having a second waveform whose current value periodically changes, and each period of the second waveform includes a current value 0 time period.
  • a power supply device comprising the power supply circuit of the first aspect.
  • a control method of a power supply circuit comprising: a primary rectification unit for rectifying an input alternating current to output a first voltage whose voltage value is periodically changed; and a modulating unit for Modulating the first voltage to generate a second voltage; a transformer for generating a third voltage according to the second voltage; and a secondary rectifying filtering unit, configured to rectify and filter the third voltage to generate a first a current;
  • the control method includes: the power source provides electricity a control unit in the path adjusts the first current to generate an output current of the power supply circuit, the output current has a second waveform in which the current value periodically changes, and each period of the second waveform includes The period in which the current value takes a value of zero.
  • the power supply circuit provided by the application removes the liquid electrolytic capacitor on the primary side, reduces the volume of the power supply circuit, and improves the service life and safety of the power supply circuit.
  • FIG. 1 is a schematic structural diagram of a power supply circuit provided by an embodiment of the present invention.
  • FIG. 2 is a diagram showing an example of a waveform of a first voltage to be modulated according to an embodiment of the present invention.
  • Fig. 3 is a comparison diagram of voltage waveforms before and after modulation by a conventional power supply circuit.
  • FIG. 4 is a diagram showing an example of a waveform of a second voltage obtained by modulating a first voltage according to an embodiment of the present invention.
  • FIG. 5 is a diagram showing an example of a first waveform after secondary rectification filtering according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a power supply circuit according to another embodiment of the present invention.
  • FIG. 7 is a diagram showing an example of a waveform of an output current and a waveform for generating a control signal for generating the waveform according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a power supply circuit according to still another embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a power supply circuit according to still another embodiment of the present invention.
  • FIG. 10 is a schematic flowchart of a fast charging process according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a power supply device according to an embodiment of the present invention.
  • FIG. 12 is a schematic flowchart of a control method provided by an embodiment of the present invention.
  • the primary side of the power supply circuit is provided with both a primary rectifying unit and a primary filtering unit.
  • the primary filtering unit typically contains one or more liquid electrolytic capacitors.
  • the liquid electrolytic capacitor has the characteristics of large capacitance and strong filtering ability. The presence of the liquid electrolytic capacitor allows the output of the power supply circuit to be a constant direct current.
  • liquid electrolytic capacitors have short life and explosive properties, resulting in short life and unsafe operation of the power supply circuit.
  • charging the battery in the device to be charged with a constant direct current causes polarization and lithium evolution of the battery, which may reduce the service life of the battery.
  • Embodiments of the present invention provide a power supply circuit in which a liquid electrolytic capacitor on a primary side is removed.
  • the power supply circuit can be used to charge a battery in the device to be charged.
  • the device to be charged referred to in the present application may be a mobile terminal, such as a "communication terminal” (or simply “terminal”), including but not limited to being configured to be connected via a wireline (eg via a public switched telephone network) Network, PSTN), digital subscriber line (DSL), digital cable, direct cable connection, and/or another data connection/network) and/or via (eg, for cellular networks, wireless local area networks) Network, WLAN), digital television networks such as digital video broadcasting handheld (DVB-H) networks, satellite networks, amplitude modulation-frequency modulation (AM-FM) broadcast transmitters, and/or A device for receiving/transmitting a communication signal by a wireless interface of another communication terminal.
  • a wireline eg via a public switched telephone network
  • PSTN public switched telephone network
  • DSL digital subscriber line
  • digital cable direct cable connection, and/or another data connection/network
  • WLAN wireless local area networks
  • digital television networks such as digital video broadcasting handheld (DVB-H) networks, satellite
  • Wireless communication terminals that are arranged to communicate over a wireless interface may be referred to as “wireless communication terminals,” “wireless terminals,” and/or “mobile terminals.”
  • mobile terminals include, but are not limited to, satellite or cellular telephones; personal communication system (PCS) terminals that can combine cellular radio telephones with data processing, fax, and data communication capabilities; may include radio telephones, pagers, the Internet/ Intranet access, web browser, memo pad, calendar, and/or personal digital assistant (PDA) for global positioning system (GPS) receivers; and conventional laptop and/or palm Receiver or other electronic device including a radiotelephone transceiver.
  • PCS personal communication system
  • PDA personal digital assistant
  • GPS global positioning system
  • a power supply circuit 10 may include a primary rectification unit 11 , a modulation unit 12 , a transformer 13 , and a secondary rectification filtering unit 14 .
  • the respective components of the power supply circuit 10 will be described in detail below.
  • the primary rectifying unit 11 can be configured to rectify the input alternating current to output a first voltage whose current value periodically changes.
  • the incoming alternating current may also be referred to as utility power.
  • the input AC power may be, for example, an alternating current of 220 V or an alternating current of 110 V, which is not specifically limited in the embodiment of the present invention.
  • the voltage waveform of the first voltage is a periodically varying waveform. As shown in FIG. 2, the waveform of the first voltage may be a pulsation waveform, or a slap wave.
  • the form of the primary rectifying unit 11 is not specifically limited in the embodiment of the present invention.
  • the primary rectifying unit 11 may be a full-bridge rectifying circuit composed of four diodes, or may be other types of rectifying circuits, such as a half-bridge rectifying circuit.
  • Modulation unit 12 can be used to modulate the first voltage to generate a second voltage.
  • the modulation unit 12 can also be referred to as a chopper unit or a chopper.
  • modulation unit 12 may also be referred to as a chopping unit or a chopper.
  • the working mode of the modulation unit 12 is not specifically limited in the embodiment of the present invention.
  • the modulating unit 12 may modulate the first voltage by means of pulse width modulation (PWM), or may modulate the first voltage by means of frequency modulation.
  • PWM pulse width modulation
  • the voltage output by the primary rectifying unit 11 needs to be filtered by the primary filtering unit (including one or more liquid electrolytic capacitors) to form a constant DC power.
  • the voltage waveform of the constant direct current is usually a straight line, that is, the voltage waveform before modulation shown in FIG.
  • the modulation unit modulates (chopper) the constant voltage to form a modulated voltage as shown in FIG. 3.
  • the constant voltage signal is reduced to a small number.
  • the power supply circuit removes the liquid electrolytic capacitor for primary filtering, and directly modulates the first voltage whose voltage value is periodically changed after the primary rectification.
  • the waveform of the first voltage as the waveform shown in FIG. 2 as an example
  • the waveform of the second voltage obtained after the modulation can be seen in FIG. 4.
  • the second voltage also contains many small pulse signals, but the amplitudes of these pulse signals are not equal, but periodically varied.
  • the dotted line of Fig. 4 is the envelope of the pulse signal constituting the second voltage.
  • the envelope of the pulse signal constituting the second voltage is substantially the same as the waveform of the first voltage.
  • the transformer 13 can be configured to generate a third voltage based on the second voltage.
  • the transformer 13 can be used to couple the second voltage from the primary to the secondary of the transformer to obtain a third voltage.
  • the transformer 13 can be used to perform a voltage-dependent operation on the second transformer to obtain a third voltage.
  • the transformer 13 can be an ordinary transformer or a high frequency transformer operating at a frequency of 50 kHz to 2 MHz.
  • the transformer 13 may include a primary winding and a secondary winding. The form of the primary winding and the secondary winding in the transformer 13, and the manner in which the primary winding, the secondary winding are connected to other units in the power supply circuit 10, and the type of switching power supply employed by the power supply circuit 10 are related.
  • the power supply circuit 10 may be a power supply circuit based on a flyback switching power supply, a power supply circuit based on a forward switching power supply, or a power supply circuit based on a push-pull switching power supply.
  • the type of the switching power supply on which the power supply circuit is based is different, and the specific form and the connection mode of the primary winding and the secondary winding of the transformer 13 are different, which is not specifically limited in the embodiment of the present invention. What is shown in Figure 1 is only one possible connection of the transformer 13.
  • the secondary rectification filtering unit 14 may include a secondary rectification unit and a secondary filtering unit. This invention The embodiment does not specifically limit the rectification mode of the secondary rectifying unit.
  • the secondary rectifying unit can synchronously rectify the voltage (or current) sensed by the secondary winding of the transformer using a synchronous rectifier (SR) chip.
  • the secondary rectifying unit may employ a diode for secondary rectification.
  • a secondary filtering unit can be used to secondary filter the voltage after secondary rectification.
  • the secondary filtering unit may include one or more solid capacitors, or may also include a combination of a solid capacitor and a common capacitor such as a ceramic capacitor.
  • a first current can be obtained, and the waveform of the first current is hereinafter referred to as a first waveform.
  • the solid line in Fig. 5 is an example of the first waveform.
  • the first waveform is not a waveform having a constant current value, but a waveform in which the current value periodically changes, and the reason is explained as follows.
  • the second voltage of the input transformer 13 is composed of many small pulse signals whose amplitude periodically changes.
  • the third voltage transmitted by the transformer 13 to the secondary side is also composed of a number of small pulse signals whose amplitude periodically changes.
  • the secondary rectifying and filtering unit 14 is provided with a secondary filtering capacitor, but compared with the liquid electrolytic capacitor, the secondary filtering capacitor usually selects some solid capacitors with a lower capacitance.
  • the capacitance of a solid capacitor is generally low and the filtering capability is relatively weak. Therefore, the main function of the secondary filter capacitor is to filter many small pulse signals output after secondary rectification into periodically varying continuous signals, the waveforms of which are generally waveforms similar to those of these small pulse signals. .
  • the first waveform is not a complete pulsation waveform, and the peaks and troughs of the first waveform do not reach the peaks and troughs of the pulsation waveform (dashed line in FIG. 5).
  • the main reason why the peak of the first waveform does not reach the peak of the pulsation waveform is that the power supply circuit 10 generally monitors its own output voltage and/or output current, and limits the output voltage and/or current limiting the output current.
  • the voltage limiting and/or current limiting operation limits the peak of the pulsating waveform below a predetermined amplitude, thereby forming a first waveform after peak clipping as shown in FIG.
  • the main reason that the trough of the first waveform does not reach the trough of the pulsation waveform is that the secondary filter capacitor in the secondary rectification filtering unit 14 has a clamping effect on the voltage on the secondary side charging line, so that the secondary side charging line The voltage and current on the line cannot reach 0 points.
  • the secondary filter capacitor enters a discharge state, so that the voltage on the charging line does not continue to drop, thereby being the first
  • the trough of the waveform is "clamped" to a value greater than 0.
  • the specific size of the value is related to the capacitance of the secondary filter capacitor, which is not specifically limited in the embodiment of the present invention.
  • the power supply circuit 10 removes the liquid electrolytic capacitor on the primary side, thereby reducing the volume of the power supply circuit and improving the service life and safety of the power supply circuit.
  • the power supply circuit 10 can be used to charge a battery in the device to be charged. During the charging process, if the battery can be controlled for periodic charging and discharging, the polarization and lithium deposition of the battery can be greatly reduced, thereby improving the service life and safety of the battery.
  • the secondary filter capacitor in the secondary rectification filtering unit 14 has a clamping effect on the voltage on the charging line of the power supply circuit 10, resulting in the secondary filtering.
  • the valley of the waveform of the first current ie, the first waveform
  • the battery in the device to be charged may always be in a state of charge, and the periodic discharge of the battery cannot be guaranteed.
  • the power supply circuit 10 may further include a control unit 15.
  • the control unit 15 can be configured to adjust the first current to generate an output current of the power supply circuit 10.
  • the output current of the power supply circuit 10 may have a second waveform in which the current value periodically changes, and each period of the second waveform includes a period in which the current value takes a value of zero.
  • the second waveform includes a period in which the current value takes a value of 0 and a period in which the current value takes a value other than 0.
  • a period in which the current value takes a value of 0 is referred to as a first period
  • a period in which a current value is not 0 is referred to as a second period.
  • the second waveform is a waveform of the output current, and the current value of the output current in the first period takes a value of 0, indicating that the power supply circuit 10 has no output during the first period.
  • the battery in the device to be charged generally needs to continuously supply power to the system in the device to be charged, the battery will be in a discharged state.
  • the current value of the output current is non-zero in the second period, indicating that the output of the power supply circuit 10 is restored in the second period.
  • the battery in the device to be charged is in a charged state. It can be seen that, since each period of the second waveform has a first period in which the current value is 0 and a second period in which the current value is not 0, the battery in the device to be charged can enter a periodic charging and discharging state. , thereby greatly reducing the polarization and lithium deposition of the battery, thereby improving the service life and safety of the battery.
  • the control unit 15 can be, for example, a micro-control unit (MCU).
  • the control unit 15 can control other units in the power supply circuit 10 by transmitting control signals to other units in the power supply circuit 10.
  • the manner in which the control unit 15 adjusts the first current may be various, and correspondingly, the control unit 15 is connected to other units in the power supply circuit 10.
  • FIG. 6 is an embodiment of control unit 15 adjusting the first current to form an output current through zero.
  • the power supply circuit 10 may further include a first switching unit 62 for controlling the switching of the charging line 61 of the power supply circuit 10.
  • Charging line 61 can be used to transfer electrical energy.
  • the charging line 61 can be used to transmit a charging voltage and/or a charging current to the device to be charged.
  • the charging line 61 may be, for example, VBUS in USB.
  • the first switching unit 62 can be any device having a line on/off control function. As shown in FIG. 6, the first switching unit 62 may be a metal oxide semiconductor (MOS) transistor, and the gate of the MOS transistor may be connected to the control unit 15 to receive a control signal from the control unit 15. The source and drain of the MOS transistor can be connected in series in the charging line 61 so that the charging line 61 can be turned on or off under the control of the control signal.
  • MOS metal oxide semiconductor
  • control unit 15 can be configured to control the first switching unit 62 to be in an off state during a partial period of each period of the first waveform to turn off the output of the power supply circuit 10.
  • the embodiment of the present invention does not specifically limit the manner of selecting the foregoing partial time period, and may be any one or more time periods of each period of the first waveform.
  • the partial period may be a period in which the trough of the first waveform is located.
  • the control unit 15 can control the first light-opening unit 62 to be in an off state during a portion or all of the period in which the first waveform is in the trough to turn off the output of the power supply circuit 10.
  • the first switch is controlled during a period of the valley of each period of the first waveform compared to a manner of controlling the first switching unit 62 to be in an off state at other periods than the period in which the valley of each of the first waveforms is removed
  • the unit 62 is in the off state, the following effects can be achieved: under the premise that the battery is periodically charged and discharged, the charging efficiency of the battery is maximized.
  • control unit 15 controls the first light-opening unit 62 to be in an off state during a part or all of the period in which the first waveform is in the trough, and the manner in which the control unit 15 determines the period of the trough of the first waveform may be various.
  • the control unit 15 samples the first current and determines a period in which the trough of the first waveform is located based on the sampled value of the first current.
  • the period of the first current has a synchronous relationship with the period of many other signals in the power supply circuit 10, such as a voltage signal or a current signal output by the primary rectifying unit, a voltage signal or a current signal output by the secondary rectifying unit, and the like.
  • Control unit 15 can be based on the same The waveform of the step signal, and the synchronization relationship between the waveform of the synchronization signal and the first waveform determine the period in which the trough of the first waveform is located.
  • the control unit 15 can send a control signal as shown in FIG. 7 to the first switch 62, and control the valley of the first waveform in the power supply circuit 10.
  • the period stops outputting, so that a second waveform including a period in which the current value takes a value of 0 as shown in FIG. 7 can be formed.
  • Figure 8 is another embodiment of control unit 15 adjusting the first current to form an output current through zero.
  • the power supply circuit 10 may further include a load circuit 81 connected in parallel between the charging circuits of the power supply circuit 10, and a second switching unit 82 for controlling the switching of the load circuit 81.
  • the charging circuit can be a circuit formed by a charging line and a ground line.
  • the charging circuit may be a loop formed by VBUS and GND.
  • the load circuit 81 is introduced inside the power supply circuit 10 in the embodiment of the present invention.
  • the configuration of the load on the load circuit 81 can be such that when the second switching unit 82 is in the closed state, the electrical energy transmitted on the charging circuit is consumed by the load in the load circuit 81.
  • the embodiment of the present invention does not specifically limit the form of the load on the load circuit 81.
  • the load can be, for example, a resistor or other device that can be used to dissipate electrical energy.
  • the size of the load may be determined according to actual conditions, as long as the second switching unit 82 can be ensured that the electric energy on the charging circuit is consumed by the load circuit 81.
  • the control unit 15 is operable to control the second switching unit 82 to be in a closed state during a partial period of each cycle of the first waveform.
  • the second switching unit 82 is in the closed state, the load circuit 81 is in an operating state, and the electric energy on the charging circuit can be consumed by the load circuit 81 and not outputted to the outside of the power supply circuit 10. Therefore, when the load circuit 81 is in the operating state, the output current of the power supply circuit 10 is zero.
  • the secondary rectification filtering unit 14 may include a filter circuit 141 (should be understood, The secondary rectification filtering unit may also include devices associated with secondary rectification, and for simplicity, only the devices associated with this embodiment in the secondary rectification filtering unit 14 are shown in FIG.
  • the filter circuit 141 can be composed of one or more capacitors 143 (such as solid capacitors) connected in parallel.
  • the filter circuit 141 may further include a third switching unit 142 for controlling the switching circuit 141 to be turned on and off.
  • the control unit 15 in the embodiment of the present invention controls the third switching unit 142 to be in an off state during a target period in each period of the first waveform, wherein the target period is the first The period in which the trough of the waveform is located.
  • the capacitance in the filter circuit 141 should be in the discharged state during the target period, but since the control unit 15 controls the filter circuit 141 to not operate through the third switching unit 142 in the target period, The capacitance in the filter circuit 141 is prevented from being discharged to the outside, and thus the power supply circuit 10 has no output. In this way, the output current of the power supply circuit 10 is 0 during the target period.
  • the third switching unit 142 may include a MOS transistor.
  • the anode of the filter capacitor 143 can be connected to the charging circuit of the power supply circuit 10 (such as VBUS), the cathode of the filter capacitor 143 can be connected to the source of the MOS transistor, and the drain of the MOS transistor can be connected to the ground (such as GND).
  • the gate can be connected to the control unit 15.
  • the source of the MOS transistor is connected to the cathode of the filter capacitor 143 so that the cathode of the body diode inside the MOS transistor is grounded, so that when the MOS transistor is closed, the filter capacitor 143 does not discharge the body diode.
  • a power supply circuit for charging a device to be charged is mentioned in the related art.
  • the power supply circuit operates in a constant voltage mode.
  • the output voltage of the power supply circuit is maintained substantially constant, such as 5V, 9V, 12V or 20V.
  • the output voltage of the power supply circuit is not suitable for direct loading to both ends of the battery, but needs to be converted by a conversion circuit in the device to be charged to obtain the expected charging voltage and/or charging current of the battery in the device to be charged. .
  • the conversion circuit can be used to transform the output voltage of the power supply circuit to meet the desired charging voltage and/or charging current of the battery.
  • the conversion circuit can refer to a charge management module, such as an integrated circuit (IC). Used to manage the charging voltage and/or charging current of the battery during charging of the battery.
  • the conversion circuit can have the function of a voltage feedback module and/or have the function of a current feedback module to enable management of the charging voltage and/or charging current of the battery.
  • the charging process of the battery may include one or more of a trickle charging phase, a constant current charging phase, and a constant voltage charging phase.
  • the conversion circuit can utilize a current feedback loop such that the current entering the battery during the trickle charge phase meets the magnitude of the charge current expected by the battery (eg, the first charge current).
  • the conversion circuit can utilize the current feedback loop such that the current entering the battery during the constant current charging phase meets the expected charging current of the battery (eg, the second charging current, which can be greater than the first charging current) .
  • the conversion circuit can utilize a voltage feedback loop such that the magnitude of the voltage applied across the battery during the constant voltage charging phase satisfies the expected charging voltage of the battery.
  • the conversion circuit when the voltage output by the power supply circuit is greater than the expected charging voltage of the battery, the conversion circuit can be used to step down the voltage of the power supply circuit output so that the charging voltage obtained after the step-down conversion satisfies the battery Expected charging voltage requirements. As still another example, when the voltage output by the power supply circuit is less than the charging voltage expected by the battery, the conversion circuit can be used to boost the voltage output by the power supply circuit so that the charging voltage obtained after the boost conversion satisfies the battery. The expected charging voltage requirement.
  • the conversion circuit for example, Buck is lowered.
  • the voltage circuit can step down the voltage outputted by the power supply circuit so that the charging voltage obtained after the voltage reduction satisfies the charging voltage demand expected by the battery.
  • a conversion circuit (such as a boost voltage boosting circuit) can boost the voltage of the power supply circuit output so that the charging voltage obtained after boosting satisfies the charging voltage demand expected by the battery.
  • the conversion circuit is limited by the low conversion efficiency of the circuit, so that the electric energy of the unconverted portion is dissipated as heat. This part of the heat will focus on the inside of the device to be charged.
  • the design space and heat dissipation space of the device to be charged are very small (for example, the physical size of the mobile terminal used by the user is getting thinner and lighter, and a large number of electronic components are densely arranged in the mobile terminal to improve the performance of the mobile terminal), which is not only
  • the design difficulty of the conversion circuit is improved, and the heat focused on the device to be charged is difficult to remove in time, thereby causing an abnormality of the device to be charged.
  • the heat accumulated on the conversion circuit may cause thermal interference to the electronic components near the conversion circuit, causing abnormal operation of the electronic components.
  • the heat accumulated on the conversion circuit may shorten the life of the conversion circuit and nearby electronic components.
  • Another example is to convert the heat accumulated on the circuit, It may cause thermal interference to the battery, which may cause abnormal battery charging and discharging.
  • Another example is the heat accumulated on the circuit, which may cause the temperature of the device to be charged to rise, which affects the user's experience in charging.
  • the heat accumulated on the conversion circuit may cause a short circuit of the conversion circuit itself, so that the voltage output from the power supply circuit is directly loaded on both ends of the battery, causing abnormal charging. If the battery is in an overvoltage state for a long time, it may even cause The explosion of the battery jeopardizes user safety.
  • the embodiment of the invention further provides a power supply circuit 10.
  • the control unit 15 in the power supply circuit 10 can also be used to communicate with the device to be charged to adjust the output power of the power supply circuit 10 such that the output voltage and/or output current of the power supply circuit 10 and the battery in the device to be charged are currently The charging phase is matched.
  • the charging phase in which the battery is currently located may include at least one of the following phases: a trickle charging phase, a constant voltage charging phase, and a constant current charging phase.
  • the above is in communication with the device to be charged to adjust the output power of the power supply circuit so that the output voltage and/or output current of the power supply circuit is in the device to be charged.
  • the matching of the charging phase currently in the battery may include: communicating with the device to be charged during the constant voltage charging phase of the battery to adjust the output power of the power supply circuit, so that the output voltage of the power supply circuit corresponds to the constant voltage charging phase. The charging voltages match.
  • the above-mentioned communication with the device to be charged communicates with the output power of the power supply circuit so that the output voltage and/or output current of the power supply circuit is in the device to be charged.
  • the matching of the charging phase currently in the battery may include: communicating with the device to be charged during the constant current charging phase of the battery to adjust the output power of the power supply circuit, so that the output current of the power supply circuit corresponds to the constant current charging phase. The charging current is matched.
  • the power supply circuit 10 having the communication function provided by the embodiment of the present invention is described in more detail below.
  • the power supply circuit 10 can acquire status information of the battery.
  • the status information of the battery may include current battery information and/or voltage information of the battery.
  • the power supply circuit 10 can adjust the output voltage of the power supply circuit 10 itself according to the acquired state information of the battery to meet the demand of the battery's expected charging voltage and/or charging current, and the power supply circuit 10 adjusts the output voltage. It can be directly loaded to the battery to charge the battery (hereinafter referred to as "direct charge"). Further, during the constant current charging phase of the battery charging process, the voltage outputted by the power supply circuit 10 can be directly loaded at both ends of the battery to charge the battery.
  • the power supply circuit 10 can have the function of a voltage feedback module and the function of a current feedback module to enable management of the charging voltage and/or charging current of the battery.
  • the power supply circuit 10 adjusts the output voltage of the power supply circuit 10 according to the acquired state information of the battery.
  • the power supply circuit 10 can obtain the state information of the battery in real time, and according to the battery that is acquired each time.
  • the real-time status information adjusts the voltage output by the power supply circuit 10 itself to satisfy the charging voltage and/or charging current expected by the battery.
  • the power supply circuit 10 adjusts the output voltage of the power supply circuit 10 according to the state information of the battery acquired in real time. It may mean that the power supply circuit 10 can acquire different times during the charging process as the battery voltage increases during the charging process.
  • the current state information of the battery, and the output voltage of the power supply circuit 10 itself is adjusted in real time according to the current state information of the battery to meet the demand of the battery for the expected charging voltage and/or charging current.
  • the charging process of the battery may include at least one of a trickle charging phase, a constant current charging phase, and a constant voltage charging phase.
  • the power supply circuit 10 can output a first charging current to charge the battery during the trickle charging phase to meet the battery's expected charging current (the first charging current can be a constant DC current).
  • the power supply circuit 10 can utilize the current feedback loop such that the current supplied by the power supply circuit 10 during the constant current charging phase and the current entering the battery meets the demand for the charging current expected by the battery (eg, the second charging current, For the current of the pulsating waveform, the second charging current may be greater than the first charging current, and the current peak value of the pulsating waveform in the constant current charging phase may be greater than the constant DC current in the trickle charging phase, and the constant current in the constant current charging phase may be It means that the current peak or average value of the pulsating waveform remains basically unchanged).
  • the power supply circuit 10 can utilize the voltage feedback loop to keep the voltage output from the power supply circuit 10 to the device to be charged (i.e., constant DC voltage) constant during the constant voltage charging phase.
  • the power supply circuit 10 referred to in the embodiment of the present invention can be used to control a constant current charging phase of a battery in a device to be charged.
  • the control functions of the trickle charging phase and the constant voltage charging phase of the battery in the device to be charged may also be performed cooperatively by the power supply circuit 10 and the additional charging chip in the device to be charged, which are mentioned in the embodiments of the present invention.
  • the charging power received by the battery in the trickle charging phase and the constant voltage charging phase is small, and the efficiency conversion loss and heat accumulation of the internal charging chip of the device to be charged are acceptable.
  • the constant current charging phase or the constant current phase mentioned in the embodiment of the present invention may refer to a charging mode that controls the output current of the power supply circuit 10, and does not require that the output current of the power supply circuit 10 remains completely constant.
  • the constant for example, may be that the current peak or average value of the pulsation waveform outputted by the power supply circuit 10 remains substantially constant, or remains substantially constant for a period of time.
  • the power supply circuit 10 is typically charged in a constant current charging phase using a piecewise constant current.
  • the multi-stage constant current charging may have N constant current stages (N is an integer not less than 2), and the segmented constant current charging starts the first stage charging with a predetermined charging current, the points The N constant current phases of the segment constant current charging are sequentially performed from the first phase to the Nth phase.
  • N is an integer not less than 2
  • the current constant current phase in the constant current phase shifts to the next constant current phase, the current peak or average value of the pulsation waveform can be small; when the battery voltage reaches the charge termination voltage threshold, the previous constant current in the constant current phase The phase will move to the next constant current phase.
  • the current conversion process between two adjacent constant current phases may be gradual, or may be a stepped jump change.
  • the constant current mode may refer to a charging mode that controls the peak value or the average value of the periodically varying current, that is, The peak value of the output current of the control power supply circuit 10 does not exceed the current corresponding to the constant current mode.
  • the constant current mode may refer to a charging mode that controls the peak value of the alternating current.
  • the power supply circuit 10 can support the first charging mode and the second charging mode, and the power supply circuit 10 charges the battery faster than the power supply circuit 10 in the second charging mode.
  • the charging speed of the battery in charging mode In other words, the power supply circuit operating in the second charging mode is less time consuming to charge the battery of the same capacity than the power supply circuit operating in the first charging mode.
  • the power supply circuit 10 in the first charging mode, charges the battery through the second charging channel, and in the second charging mode, the power supply circuit 10 charges the battery through the first charging channel.
  • the first charging mode may be a normal charging mode
  • the second charging mode may be a fast charging mode.
  • the normal charging mode refers to the power supply circuit outputting a relatively small current value (usually less than 2.5A) or charging the battery in the charging device with relatively small power (usually less than 15W), thinking in the normal charging mode. To fully charge a large capacity battery (such as a 3000 mAh battery), it usually takes several hours.
  • the power supply circuit can output a relatively large current (usually greater than 2.5A, such as 4.5A, 5A or higher) or a relatively large power (usually greater than or equal to 15W) to be treated in the charging device. The battery is charged.
  • the charging time required for the power supply circuit to completely fill the same capacity battery in the fast charging mode can be significantly shortened and the charging speed is faster.
  • the output current of the power supply circuit 10 can have a second waveform in which the current value periodically changes.
  • the second waveform may refer to a current waveform of the output current of the power supply circuit 10 operating in the second charging mode.
  • the output voltage of the power supply circuit 10 The voltage value can be a constant voltage value, and the current waveform of the output current can vary with load.
  • the device to be charged may perform bidirectional communication with the power supply circuit 10 (or the control unit 15 in the power supply circuit 10) to control the output of the power supply circuit 10 in the second charging mode (ie, control the second charge)
  • the power supply in the mode provides the charging voltage and/or charging current provided by the circuit 10.
  • the device to be charged may include a charging interface, and the device to be charged may communicate with the power supply circuit 10 through a data line in the charging interface.
  • the charging interface as a USB interface as an example, the data line can be a D+ line and/or a D- line in the USB interface.
  • the device to be charged may also be in wireless communication with the power supply circuit 10.
  • the embodiment of the present invention does not specifically limit the communication content of the power supply circuit 10 and the device to be charged, and the control mode of the device to be charged to the output of the power supply circuit 10 in the second charging mode.
  • the device to be charged can be provided with a power source.
  • the circuit 10 communicates, interacting with the current total voltage of the battery in the device to be charged and/or the current total amount of power, and adjusting the output voltage or output current of the power supply circuit 10 based on the current total voltage of the battery and/or the current total amount of power.
  • the communication content between the charging device and the power supply circuit 10 will be described in detail below in conjunction with the specific embodiment, and the manner in which the device to be charged controls the output of the power supply circuit 10 in the second charging mode will be described in detail.
  • the above description of the embodiment of the present invention does not limit the master-slave of the power supply circuit 10 and the device to be charged.
  • either the power supply circuit 10 and the device to be charged can initiate the two-way as the master device.
  • the communication session correspondingly the other party may make a first response or a first reply as a communication initiated by the slave device to the master device.
  • the identity of the master and slave devices can be confirmed by comparing the level of the power supply circuit 10 side and the device to be charged with respect to the earth during communication.
  • the embodiment of the present invention does not limit the specific implementation manner of the two-way communication between the power supply circuit 10 and the device to be charged.
  • the power supply circuit 10 and any device to be charged initiate a communication session as the master device.
  • the other party as the slave device makes a first response or a first reply to the communication session initiated by the master device, and the master device can make a second response to the first response or the first reply of the slave device.
  • the negotiation process of one charging mode is completed between the master and the slave device.
  • the master and slave devices can perform the charging operation between the master and the slave device after completing the negotiation of the multiple charging mode to ensure the safe and reliable charging process after the negotiation. Executed.
  • One way that the master device can make a second response according to the first response or the first response of the slave device to the communication session may be that the master device can receive the slave device policy A first response or a first reply to the communication session, and making a targeted second response based on the received first response or first reply of the slave device. For example, when the master device receives the first response or the first reply of the slave device for the communication session within a preset time, the master device makes a first response or a first reply to the slave device.
  • the specific second response is specifically: the master device side and the slave device side complete the negotiation of the one charging mode, and the master device side and the slave device side perform the charging operation according to the first charging mode or the second charging mode according to the negotiation result, That is, the power supply circuit 10 operates to charge the device to be charged in the first charging mode or the second charging mode according to the negotiation result.
  • One way that the master device can make a further second response according to the first response or the first response of the slave device to the communication session may also be that the master device does not receive the preset time.
  • the master device side also makes a targeted second response to the first response or the first reply of the slave device. For example, when the master device does not receive the first response or the first response of the slave device for the communication session within a preset time, the master device also responds to the first response or the first response of the slave device.
  • the specific second response is specifically: the master device side and the slave device side complete the negotiation of the one charging mode, and the charging operation is performed according to the first charging mode between the master device side and the slave device side, that is, the power supply circuit 10 works.
  • the device to be charged is charged in the first charging mode.
  • the power supply circuit 10 when the device to be charged initiates a communication session as the master device, the power supply circuit 10 does not need to wait after making a first response or a first reply to the communication session initiated by the device to the master device.
  • the charging device makes a targeted second response to the first response or the first reply of the power supply circuit 10, that is, the negotiation process of the primary charging mode is completed between the power supply providing circuit 10 and the device to be charged, and then the power supply circuit is provided. 10 can determine, according to the negotiation result, charging the device to be charged in the first charging mode or the second charging mode.
  • the process in which the device to be charged performs bidirectional communication with the power supply circuit 10 to control the output of the power supply circuit 10 in the second charging mode includes: the device to be charged and the power supply circuit 10 perform Two-way communication to negotiate a charging mode between the power supply circuit 10 and the device to be charged.
  • the device to be charged performs two-way communication with the power supply circuit 10 to negotiate a charging mode between the power supply circuit 10 and the device to be charged, including: the device to be charged receives the first transmission by the power supply circuit 10. An instruction for inquiring whether the device to be charged turns on the second charging mode; and the device to be charged sends a reply to the first command to the power supply circuit 10
  • the instruction, the reply instruction of the first instruction is used to indicate whether the device to be charged agrees to enable the second charging mode; and in the case that the device to be charged agrees to turn on the second charging mode, the device to be charged controls the power supply circuit 10 to pass the first charging channel Charging batteries.
  • the process in which the device to be charged performs bidirectional communication with the power supply circuit 10 to control the output of the power supply circuit 10 in the second charging mode includes: the device to be charged and the power supply circuit 10 Two-way communication is performed to determine a charging voltage output by the power supply circuit 10 for charging the device to be charged in the second charging mode.
  • the device to be charged performs two-way communication with the power supply circuit 10 to determine a charging voltage output by the power supply circuit 10 for charging the device to be charged in the second charging mode, including:
  • the charging device receives a second command sent by the power supply circuit 10, the second command is for inquiring whether the output voltage of the power supply circuit 10 matches the current total voltage of the battery of the device to be charged; the device to be charged transmits the second to the power supply circuit 10.
  • the reply command of the command, the reply command of the second command is used to indicate that the output voltage of the power supply circuit 10 matches the current total voltage of the battery, being high or low.
  • the second instruction may be used to query whether the current output voltage of the power supply circuit 10 is suitable as the charging voltage for charging the device to be charged outputted by the power supply circuit 10 in the second charging mode, the second instruction
  • the reply command can be used to indicate that the output voltage of the current power supply circuit 10 is appropriate, high or low.
  • the current output voltage of the power supply circuit 10 matches the current total voltage of the battery, or the current output voltage of the power supply circuit 10 is suitable as the charging voltage for charging the device to be charged outputted by the power supply circuit 10 in the second charging mode. It can be said that the difference between the current output voltage of the power supply circuit 10 and the current total voltage of the battery is within a preset range (usually on the order of several hundred millivolts).
  • the current output voltage is higher than the current total battery voltage includes that the difference between the output voltage of the power supply circuit 10 and the current total voltage of the battery is higher than a preset range.
  • the current output voltage is lower than the current total battery voltage includes that the difference between the output voltage of the power supply circuit 10 and the current total voltage of the battery is lower than a preset range.
  • the process in which the device to be charged performs bidirectional communication with the power supply circuit 10 to control the output of the power supply circuit 10 in the second charging mode may include: the device to be charged and the power supply circuit 10 Two-way communication is performed to determine a charging current output by the power supply circuit 10 for charging the device to be charged in the second charging mode.
  • the device to be charged performs two-way communication with the power supply circuit 10 to determine the device for charging to be output by the power supply circuit 10 in the second charging mode.
  • the charging current for charging may include: receiving, by the charging device, a third instruction sent by the power supply circuit 10, the third instruction for inquiring about a maximum charging current currently supported by the device to be charged; and the device to be charged transmitting the third instruction to the power supply circuit 10.
  • the reply command of the third command is used to indicate the maximum charging current currently supported by the device to be charged, so that the power supply circuit 10 determines the power supply circuit 10 in the second charging mode based on the maximum charging current currently supported by the device to be charged.
  • the output charging current for charging the device to be charged is used to indicate the maximum charging current currently supported by the device to be charged.
  • the maximum charging current currently supported by the device to be charged may be obtained according to the capacity of the battery of the device to be charged, the battery system, or the like, or may be a preset value.
  • the charging device determines the charging current for charging the device to be charged outputted by the power supply circuit 10 in the second charging mode according to the maximum charging current currently supported by the device to be charged.
  • the power supply circuit 10 can determine the maximum charging current currently supported by the device to be charged as the charging current for charging the device to be charged outputted by the power supply circuit 10 in the second charging mode, and can also comprehensively consider the device to be charged. After the currently supported maximum charging current and its own current output capability, etc., the charging current output by the power supply circuit 10 for charging the device to be charged in the second charging mode is determined.
  • the process in which the device to be charged performs bidirectional communication with the power supply circuit 10 to control the output of the power supply circuit 10 in the second charging mode may include: charging using the second charging mode
  • the device to be charged performs bidirectional communication with the power supply circuit 10 to adjust the output current of the power supply circuit 10.
  • the device to be charged performs bidirectional communication with the power supply circuit 10 to adjust the output current of the power supply circuit 10, which may include: the device to be charged receives the fourth command sent by the power supply circuit 10, and the fourth command is used to query the current battery. The total voltage; the device to be charged sends a reply command of the fourth command to the power supply circuit 10, and the reply command of the fourth command is used to indicate the current total voltage of the battery, so that the power supply circuit 10 adjusts the power supply circuit according to the current total voltage of the battery. 10 output current.
  • the process in which the device to be charged performs bidirectional communication with the power supply circuit 10 to control the output of the power supply circuit 10 in the second charging mode may include: the device to be charged and the power supply circuit 10 perform Two-way communication to determine if the charging interface is in poor contact.
  • the device to be charged performs two-way communication with the power supply circuit 10 to determine whether the charging interface is in poor contact.
  • the method may include: the device to be charged receives a fourth command sent by the power supply circuit 10, and the fourth command is used to inquire about charging. Current voltage of the device's battery; device to be charged The power supply circuit 10 sends a reply command of the fourth command, and the reply command of the fourth command is used to indicate the current voltage of the battery of the device to be charged, so that the power supply circuit 10 according to the output voltage of the power supply circuit 10 and the battery of the device to be charged The current voltage determines if the charging interface is in poor contact.
  • the power supply circuit 10 determines that the voltage difference between the output voltage of the power supply circuit 10 and the current voltage of the device to be charged is greater than a preset voltage threshold, indicating that the voltage difference is obtained by dividing the current value output by the power supply circuit 10 at this time.
  • the impedance is greater than the preset impedance threshold to determine poor contact of the charging interface.
  • poor charging interface contact may also be determined by the device to be charged.
  • the device to be charged sends a sixth command to the power supply circuit 10, the sixth command is used to inquire the output voltage of the power supply circuit 10; the device to be charged receives the reply command of the sixth command sent by the power supply circuit 10, and the sixth command
  • the reply command is for indicating the output voltage of the power supply circuit 10; the device to be charged determines whether the charging interface is in poor contact according to the current voltage of the battery and the output voltage of the power supply circuit 10.
  • the device to be charged may send a fifth command to the power supply circuit 10, and the fifth command is used to indicate that the charging interface is in poor contact.
  • the power supply circuit 10 can exit the second charging mode after receiving the fifth command.
  • FIG. 10 is only intended to assist those skilled in the art to understand the embodiments of the present invention, and is not intended to limit the embodiments of the present invention to the specific numerical values or specific examples illustrated. A person skilled in the art will be able to make various modifications or changes in the form of the embodiment of FIG. 10, and such modifications or variations are also within the scope of the embodiments of the present invention.
  • the communication flow (or fast charge communication flow) between the power supply circuit 10 and the device to be charged may include the following five stages:
  • the device to be charged can detect the type of the power supply circuit 10 through the data lines D+, D-.
  • the current to be charged by the device to be charged may be greater than a preset current threshold I2 (for example, may be 1A).
  • I2 for example, may be 1A
  • the power supply circuit 10 may consider the type of the device to be charged to be identified by the power supply circuit. Has been completed.
  • the power supply circuit 10 turns on the negotiation process with the device to be charged, and sends an instruction 1 (corresponding to the first instruction) to the device to be charged to ask whether the device to be charged agrees to provide power.
  • the way 10 charges the charging device in a second charging mode.
  • the power supply circuit 10 When the power supply circuit 10 receives the reply command of the command 1 sent by the device to be charged, and the reply command of the command 1 indicates that the device to be charged does not agree that the power supply circuit 10 charges the device to be charged in the second charging mode, the power supply circuit 10 detects the output current of the power supply circuit 10 again. When the output current of the power supply circuit 10 is still greater than or equal to I2 within a preset continuous time period (for example, may be continuous T1 time), the power supply circuit 10 again sends an instruction 1 to the device to be charged, asking whether the device to be charged agrees The power supply circuit 10 charges the device to be charged in the second charging mode.
  • a preset continuous time period for example, may be continuous T1 time
  • the power supply circuit 10 repeats the above-described steps of the stage 1 until the device to be charged agrees that the power supply circuit 10 charges the device to be charged in the second charging mode, or the output current of the power supply circuit 10 no longer satisfies the condition of greater than or equal to I2.
  • the output voltage of the power supply circuit 10 may include a plurality of gear positions.
  • the power supply circuit 10 sends an instruction 2 (corresponding to the second instruction described above) to the device to be charged to inquire whether the output voltage (current output voltage) of the power supply circuit 10 matches the current voltage of the battery in the device to be charged.
  • the device to be charged sends a reply command of the command 2 to the power supply circuit 10 to indicate that the output voltage of the power supply circuit 10 matches the current voltage of the battery of the device to be charged, which is high or low. If the reply command for the instruction 2 indicates that the output voltage of the power supply circuit 10 is high or low, the power supply circuit 10 can lower or increase the output voltage of the power supply circuit 10 and send the command 2 to the device to be charged again. It is re-inquired whether the output voltage of the power supply circuit 10 matches the current voltage of the battery. The above steps of phase 2 are repeated until the device to be charged determines that the output voltage of the power supply circuit 10 matches the current voltage of the battery of the device to be charged, and proceeds to phase 3.
  • the output voltage of the power supply circuit 10 can be adjusted in various ways. For example, a plurality of voltage gear positions from low to high may be set in advance for the output voltage of the power supply circuit 10. The higher the voltage gear position, the larger the output voltage of the power supply circuit 10. If the reply command of the instruction 2 indicates that the output voltage of the power supply circuit 10 is high, the voltage level of the output voltage of the power supply circuit 10 can be lowered from the current voltage level by one gear position; if the return command of the instruction 2 indicates the power supply If the output voltage of the providing circuit 10 is low, the voltage level of the output voltage of the power supply circuit 10 can be increased from the current voltage level by one gear.
  • the power supply circuit 10 sends an instruction 3 (corresponding to the third instruction described above) to the device to be charged, and queries the maximum charging current currently supported by the device to be charged.
  • the device to be charged sends a reply command of instruction 3 to the power supply circuit 10 to indicate the maximum charging current currently supported by the device to be charged, and enters phase 4.
  • the power supply circuit 10 determines the charging current for charging the device to be charged, which is output by the power supply circuit 10 in the second charging mode, according to the maximum charging current currently supported by the device to be charged, and then enters phase 5, that is, the constant current charging phase.
  • the power supply circuit 10 can send an instruction 4 (corresponding to the fourth instruction described above) to the device to be charged every interval of time to query the current voltage of the battery of the device to be charged.
  • the device to be charged can send a reply command of the command 4 to the power supply circuit 10 to feed back the current voltage of the battery.
  • the power supply circuit 10 can judge whether the contact of the charging interface is good or not, and whether it is necessary to lower the output current of the power supply circuit 10, based on the current voltage of the battery.
  • the command 5 (corresponding to the fifth command) may be sent to the device to be charged, and the power supply circuit 10 may exit the second charging mode, then reset and re-enter the phase 1.
  • the device to be charged agrees that the power supply circuit 10 charges the device to be charged in the second charging mode to the power supply circuit 10 to adjust the output voltage of the power supply circuit 10 to
  • the time experienced by a suitable charging voltage can be controlled within a certain range. If the time exceeds the predetermined range, the power supply circuit 10 or the device to be charged may determine that the communication process is abnormal, reset to re-enter phase 1.
  • the device to be charged may The power supply circuit 10 transmits a reply command of the command 2 to instruct the output voltage of the power supply circuit 10 to match the voltage of the battery of the device to be charged.
  • the adjustment speed of the output current of the power supply circuit 10 can be controlled within a certain range, so that an abnormality in the charging process due to the excessive adjustment speed can be avoided.
  • the magnitude of the change in the output current of the power supply circuit 10 may be controlled within 5%.
  • the power supply circuit 10 can monitor the impedance of the charging path in real time. Specifically, the power supply circuit 10 can monitor the impedance of the charging path according to the output voltage of the power supply circuit 10, the output current, and the current voltage of the battery fed back by the device to be charged.
  • the power supply circuit 10 stops charging the device to be charged in the second charging mode.
  • the communication time interval between the power supply circuit 10 and the device to be charged may be controlled within a certain range. Avoid communication short intervals and cause an abnormality in the communication process.
  • the stopping of the charging process (or the stopping of the charging process of the powering device to be charged in the second charging mode) may be divided into a recoverable stop and an unrecoverable stop.
  • the charging process is stopped, the charging communication process is reset, and the charging process re-enters Phase 1. Then, the device to be charged does not agree that the power supply circuit 10 charges the device to be charged in the second charging mode, and the communication flow does not enter phase 2.
  • the stop of the charging process in this case can be considered as an unrecoverable stop.
  • the charging process is stopped, the charging communication process is reset, and the charging process re-enters the phase 1.
  • the device to be charged agrees that the power supply circuit 10 charges the device to be charged in the second charging mode to resume the charging process.
  • the stopping of the charging process in this case can be regarded as a recoverable stop.
  • the device to be charged detects an abnormality in the battery, the charging process is stopped, resets, and re-enters Phase 1. Then, the device to be charged does not agree that the power supply circuit 10 charges the device to be charged in the second charging mode. When the battery returns to normal and the requirements of phase 1 are met, the device to be charged agrees that the power supply circuit 10 charges the device to be charged in the second charging mode.
  • the stop of the fast charge process in this case can be considered as a recoverable stop.
  • the communication steps or operations illustrated above with respect to FIG. 10 are merely examples.
  • the handshake communication between the device to be charged and the power supply circuit 10 can also be initiated by the device to be charged, that is, the device to be charged sends an instruction 1 to inquire about the power supply. Whether the circuit 10 turns on the second charging mode.
  • the reply command instructs the power supply circuit 10 to agree that the power supply circuit 10 charges the battery to be charged in the second charging mode when the power supply circuit 10 charges the device to be charged in the second charging mode.
  • a constant voltage charging phase can also be included.
  • the device to be charged may feed back the current voltage of the battery to the power supply circuit 10.
  • the charging phase transitions from the constant current charging phase to the constant voltage charging phase.
  • the charging current is gradually decreased, and when the current drops to a certain threshold, it indicates that the battery of the device to be charged has been fully charged, and the entire charging process is stopped.
  • the embodiment of the present invention further provides a power supply device.
  • the power supply device 1100 may include the power supply circuit 10 provided by any of the above embodiments.
  • the power supply device 1100 may be, for example, an adapter or a power bank or the like dedicated to charging, or may be another device capable of providing power and data services, such as a computer.
  • the power supply circuit and the power supply device provided by the embodiment of the present invention are described in detail above with reference to FIGS.
  • the control method of the power supply circuit provided by the embodiment of the present invention is described in detail below with reference to FIG.
  • the power supply circuit may be the power supply circuit 10 described in any of the above embodiments, and the description related to the power supply circuit may be referred to the foregoing, and the repeated description is omitted as appropriate.
  • the power supply circuit may include a primary rectification unit, a modulation unit, a transformer, a secondary rectification filtering unit, and a control unit.
  • the primary rectifying unit can be configured to rectify the input alternating current to output a first voltage whose voltage value periodically changes.
  • a modulation unit can be used to modulate the first voltage to generate a second voltage.
  • a transformer can be used to generate a third voltage based on the second voltage.
  • a secondary rectification filtering unit is operative to rectify and filter the third voltage to generate a first current.
  • the method of FIG. 12 can include step 1210.
  • the control unit may adjust the first current to generate an output current of the power supply circuit.
  • the output current has a second waveform in which the current value periodically changes, and each period of the second waveform includes a period in which the current value takes a value of zero.
  • the first current has a first waveform whose current value is periodically transformed;
  • the power supply circuit may further include a first switching unit for controlling the charging line of the power supply circuit to be turned on and off.
  • Step 1210 can include controlling the first switching unit to be in an open state during a portion of each period of the first waveform.
  • the first current has a first waveform whose current value is periodically changed;
  • the power supply circuit may further include a load circuit connected in parallel between the charging circuits of the power supply circuit, and for controlling the load circuit A second switching unit that is turned on and off.
  • Step 1210 can include controlling the second switching unit to be in a closed state during a portion of each cycle of the first waveform, wherein the load circuit can be configured to consume electrical energy transmitted on the charging circuit when the second switching unit is in the closed state.
  • the partial period may be a period in which the trough of the first waveform is located.
  • the secondary rectification filtering unit may include a third switching unit for controlling switching of the filter circuit in the secondary rectification filtering unit.
  • Step 1210 can include controlling the third switching unit to be in an open state during a target time period in each cycle of the first waveform, wherein the target time period is a time period in which the trough of the first waveform is located.
  • the filtering circuit may include a filtering capacitor.
  • the third switching unit may include a MOS transistor.
  • the positive pole of the filter capacitor can be connected to the charging line of the power supply circuit, and the negative pole of the filter capacitor can be connected to the source of the MOS transistor.
  • the drain of the MOS transistor can be connected to the ground, and the gate of the MOS transistor can be connected to the control unit.
  • the method of FIG. 12 may further include step 1220.
  • the control unit communicates with the device to be charged to adjust the output power of the power supply circuit such that the output voltage and/or output current of the power supply circuit matches the charging phase in which the battery in the device to be charged is currently located.
  • the charging phase of the power supply circuit to the battery includes at least one of a trickle charging phase, a constant voltage charging phase, and a constant current charging phase.
  • step 1220 may include: communicating with the device to be charged during the constant voltage charging phase of the battery to adjust the output power of the power supply circuit such that the output voltage of the power supply circuit and the constant voltage charging The charging voltages corresponding to the phases match.
  • step 1220 may include: communicating with the device to be charged during the constant current charging phase of the battery to adjust the output power of the power supply circuit, so that the output current of the power supply circuit and the constant current charging The charging currents corresponding to the phases match.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transmission to another website site, computer, server or data center via wired (eg coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a digital video disc (DVD)), or a semiconductor medium (such as a solid state disk (SSD)).
  • a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
  • an optical medium such as a digital video disc (DVD)
  • a semiconductor medium such as a solid state disk (SSD)
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Rectifiers (AREA)
  • Dc-Dc Converters (AREA)
PCT/CN2017/102932 2017-09-22 2017-09-22 电源提供电路、电源提供设备以及控制方法 WO2019056303A1 (zh)

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KR1020197018300A KR102282301B1 (ko) 2017-09-22 2017-09-22 전원 공급 회로, 전원 공급 기기 및 제어 방법(power supply circuit, power supply device and control method)
JP2019536307A JP6781843B2 (ja) 2017-09-22 2017-09-22 電源供給回路、電源供給機器及び制御方法
CN201780061431.0A CN109874364B (zh) 2017-09-22 2017-09-22 电源提供电路、电源提供设备以及控制方法
PCT/CN2017/102932 WO2019056303A1 (zh) 2017-09-22 2017-09-22 电源提供电路、电源提供设备以及控制方法
EP17925612.8A EP3537567B1 (de) 2017-09-22 2017-09-22 Stromversorgungsschaltung, stromversorgungsvorrichtung und steuerungsverfahren
TW107131353A TWI700577B (zh) 2017-09-22 2018-09-06 電源供應電路、電源供應裝置以及控制方法
US16/415,479 US11050289B2 (en) 2017-09-22 2019-05-17 Power supply circuit, power supply device and control method

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EP3537567B1 (de) 2023-02-15
CN109874364B (zh) 2023-01-13
CN109874364A (zh) 2019-06-11
TW201915657A (zh) 2019-04-16
EP3537567A4 (de) 2020-01-15
KR20190086005A (ko) 2019-07-19
US11050289B2 (en) 2021-06-29
US20190280515A1 (en) 2019-09-12
EP3537567A1 (de) 2019-09-11
KR102282301B1 (ko) 2021-07-27
JP2020504590A (ja) 2020-02-06
JP6781843B2 (ja) 2020-11-04
TWI700577B (zh) 2020-08-01

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